package chapter04.Example14;


abstract class Animal{
    abstract void shout();
}
class Cat extends Animal{
    void shout(){
        System.out.println("喵喵......");
    }
}
class Dog extends Animal{
    void shout(){
        System.out.println("汪汪......");
    }
}
public class Example14 {
    public static void main(String[] args) {
        Animal an1 = new Cat();
        Animal an2 = new Dog();
        an1.shout();
        an2.shout();
    }
}
